Manager Bob Melvin would have been fine if Bartolo Colon, making his final appearance in his 30s, lasted six innings Monday night. So after inning No. 6, Melvin approached his starting pitcher."I asked him how he was doing," Melvin said, "and he asked me how I was doing. ... I said I'm all right."Yes, he was.The A's were on their way to a 9-2 victory over the Rangers, and Colon was feeling so good that Melvin let him go one more inning. In the seventh, Colon was perfect and struck out his final two batters, both swinging.By the time he makes his next start, Sunday in Houston, he'll be 40. His birthday is Friday."Four more days until I'm 40, so I still feel like a young man," Colon said.The Rangers came in with the majors' best record after beating the Tigers three of four times, collecting 11 runs and 18 hits in the series finale. The A's came to town, and everything changed.Colon stifled the Rangers, who scored both of their runs and had all six hits on his watch, and it shouldn't be a surprise. It was his 19th career win over Texas, the most against any team, and ties him with three others - Bert Blyleven, Dennis Leonard and Jack Morris - atop the beat-Texas leaderboard."Over my career, I've pitched well against Texas, but more important is that I like to pitch on this field a lot," said Colon, who has won six straight decisions at Rangers Ballpark. "I always pitch well here, and I don't know why."Facing Texas, Colon split his first 10 decisions. But over his next 18 starts, since 2003, he's 14-2. The only runs he surrendered Monday were courtesy of No. 9 hitter Jurickson Profar, who got RBIs on a groundout and flyout. Profar is playing at second base for injured Ian Kinsler.